perf: 移动端聊天窗口返回按钮显示未读信息数

resources/assets/js/pages/manage/components/DialogWrapper.vue

@@ -9,6 +9,7 @@
             <div class="dialog-nav" :class="{completed:$A.dialogCompleted(dialogData)}">
                 <div class="dialog-back" @click="goBack">
                     <i class="taskfont">&#xe72d;</i>
+                    <div v-if="msgUnreadOnly" class="back-num">{{msgUnreadOnly}}</div>
                 </div>
 
                 <div class="dialog-block">
@@ -289,7 +290,21 @@ export default {
                 return ['multiple'];
             }
             return [];
-        }
+        },
+
+        msgUnreadOnly() {
+            let num = 0;
+            this.cacheDialogs.some(dialog => {
+                num += $A.getDialogUnread(dialog);
+            })
+            if (num <= 0) {
+                return '';
+            }
+            if (num > 99) {
+                num = "99+"
+            }
+            return String(num);
+        },
     },
 
     watch: {

resources/assets/sass/pages/components/dialog-wrapper.scss

@@ -857,14 +857,32 @@
                 justify-content: center;
             }
             .dialog-back {
+                padding-right: 6px;
                 right: auto;
                 left: 0;
                 > i {
                     font-size: 26px;
                 }
+                .back-num {
+                    font-family: "Source Sans Pro", "Helvetica Neue", Arial, sans-serif;
+                    position: absolute;
+                    top: 50%;
+                    left: 32px;
+                    background: #e6ebf1;
+                    color: $primary-title-color;
+                    transform: translate(0, -50%);
+                    font-weight: 500;
+                    font-size: 14px;
+                    border-radius: 12px;
+                    min-width: 24px;
+                    height: 24px;
+                    line-height: 24px;
+                    text-align: center;
+                    padding: 0 6px;
+                }
             }
             .dialog-block {
-                margin: 0 52px;
+                margin: 0 80px;
                 justify-content: center;
                 .dialog-avatar {
                     display: none;